under 200 is very good .if its at higher rpms, it will not keep the water in the rad.as long . so its not in the rad. long enough to cool it. if it runs hotter at rpm its either air flow or water flow. you ran the fans and it helped some so, the air is good when its on. sounds like more pump pulley to slow the water pump down . or try improve air flow . my race car would respond big time to air flow through the back of the car if it was trapping the flow under the hood! kind of like a hole in the bottom of a beer can ..